1.Pound Steaks To Be 1/4 Inch Thick, And Sprinkle Each Side With Salt, Black Pepper, And 1/8 Teaspoon Mustard; Rub Into The Meat. 2.Melt Margarine In A Large Skillet Over Medium-High Heat. Fry 2 Of The Steaks For 2 Minutes On Each Side, And Transfer To A Hot Serving Plate. Repeat With Remaining 2 Steaks. 3.Add Lemon Juice, Chives, Worcestershire Sauce, And Remaining Mustard To The Pan, And Bring To A Boil. Return The Steaks To The Pan To Heat Through, And Coat With Sauce.